Keralas or Udra Keralas are a mythical dynasty mentioned in Sanskrit epics of ancient India. In Mahabharata, the Keralas rule over a kingdom which took part in the Kurukshetra War on the side of the Pandavas. According to the Puranas, the navigators and survivors of the Yadavas of Dwaraka also settled in Kerala later, resulting in the cult of Krishna worship. And some remnants of the Sinhalas of Sri Lanka and of the Naga culture are also found here.
This Kerala Kingdom has been identified with the Chera kingdom, which existed from the 5th century BC to the 12th century AD in present-day Kerala state and Tamil Nadu in South India. The Pandyas, Cheras and the Cholas were mentioned in Tamil literature (consisting of Silappatikaram, Tirukkural etc.), complementing their mention in the existing Sanskrit literature (constituted by the Puranas, Vedas, Ramayana and the Mahabharata).
The modern people of Kerala, a Southern state of India, celebrate the legend of King Mahabali who it is believed, was the Emperor of Bharatavarsha in pre-ancient times, several eons ago. The biggest festival of Kerala is Onam, celebrated in the remembrance of King Mahabali. Mahabali was described in ancient Indian texts as belonging to the Asura clan of Kings.